122 lines
4.0 KiB
Go
122 lines
4.0 KiB
Go
/*
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Copyright 2018 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package commands
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import (
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"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
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"path/filepath"
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"strings"
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"github.com/google/go-containerregistry/v1"
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"github.com/GoogleContainerTools/kaniko/pkg/util"
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"github.com/docker/docker/builder/dockerfile/instructions"
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"github.com/sirupsen/logrus"
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)
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type AddCommand struct {
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cmd *instructions.AddCommand
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buildcontext string
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snapshotFiles []string
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}
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// ExecuteCommand executes the ADD command
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// Special stuff about ADD:
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// 1. If <src> is a remote file URL:
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// - destination will have permissions of 0600
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// - If remote file has HTTP Last-Modified header, we set the mtime of the file to that timestamp
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// - If dest doesn't end with a slash, the filepath is inferred to be <dest>/<filename>
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// 2. If <src> is a local tar archive:
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// -If <src> is a local tar archive, it is unpacked at the dest, as 'tar -x' would
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func (a *AddCommand) ExecuteCommand(config *v1.Config, buildArgs *dockerfile.BuildArgs) error {
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srcs := a.cmd.SourcesAndDest[:len(a.cmd.SourcesAndDest)-1]
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dest := a.cmd.SourcesAndDest[len(a.cmd.SourcesAndDest)-1]
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logrus.Infof("cmd: Add %s", srcs)
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logrus.Infof("dest: %s", dest)
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// First, resolve any environment replacement
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replacementEnvs := buildArgs.ReplacementEnvs(config.Env)
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resolvedEnvs, err := util.ResolveEnvironmentReplacementList(a.cmd.SourcesAndDest, replacementEnvs, true)
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if err != nil {
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return err
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}
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dest = resolvedEnvs[len(resolvedEnvs)-1]
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// Resolve wildcards and get a list of resolved sources
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srcs, err = util.ResolveSources(resolvedEnvs, a.buildcontext)
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if err != nil {
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return err
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}
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var unresolvedSrcs []string
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// If any of the sources are local tar archives:
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// 1. Unpack them to the specified destination
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// If any of the sources is a remote file URL:
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// 1. Download and copy it to the specified dest
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// Else, add to the list of unresolved sources
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for _, src := range srcs {
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fullPath := filepath.Join(a.buildcontext, src)
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if util.IsSrcRemoteFileURL(src) {
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urlDest := util.URLDestinationFilepath(src, dest, config.WorkingDir)
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logrus.Infof("Adding remote URL %s to %s", src, urlDest)
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if err := util.DownloadFileToDest(src, urlDest); err != nil {
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return err
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}
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a.snapshotFiles = append(a.snapshotFiles, urlDest)
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} else if util.IsFileLocalTarArchive(fullPath) {
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logrus.Infof("Unpacking local tar archive %s to %s", src, dest)
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if err := util.UnpackLocalTarArchive(fullPath, dest); err != nil {
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return err
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}
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// Add the unpacked files to the snapshotter
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filesAdded, err := util.Files(dest)
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if err != nil {
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return err
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}
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logrus.Debugf("Added %v from local tar archive %s", filesAdded, src)
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a.snapshotFiles = append(a.snapshotFiles, filesAdded...)
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} else {
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unresolvedSrcs = append(unresolvedSrcs, src)
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}
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}
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// With the remaining "normal" sources, create and execute a standard copy command
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if len(unresolvedSrcs) == 0 {
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return nil
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}
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copyCmd := CopyCommand{
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cmd: &instructions.CopyCommand{
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SourcesAndDest: append(unresolvedSrcs, dest),
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},
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buildcontext: a.buildcontext,
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}
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if err := copyCmd.ExecuteCommand(config, buildArgs); err != nil {
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return err
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}
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a.snapshotFiles = append(a.snapshotFiles, copyCmd.snapshotFiles...)
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return nil
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}
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// FilesToSnapshot should return an empty array if still nil; no files were changed
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func (a *AddCommand) FilesToSnapshot() []string {
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return a.snapshotFiles
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}
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// CreatedBy returns some information about the command for the image config
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func (a *AddCommand) CreatedBy() string {
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return strings.Join(a.cmd.SourcesAndDest, " ")
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}
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